Lying and deception is the theme for this week's show. Honestly.
We explore the evolution of lying, polygraph tests (and how to beat them), fibs from children and the digital age of lying. We also interview Dr Jon Simons from the University of Cambridge about the reliability of new guilt detection tests, and give you some tips on how to tell if someone is telling you porkies.
Plus, what would it be like if you couldn't tell the truth for a whole afternoon? Will Park takes part in an experiment to find out.
